A laser level is an indispensable tool for any DIYer or professional looking to ensure accuracy in their projects. Unlike traditional spirit levels, laser levels project a laser beam across a surface or room to create an instant reference line or plane. This allows for precise alignment and leveling of items like shelves, tiles, cabinets, and more. Learning how to properly use a laser level takes some practice, but can elevate the quality of your work. Here is a comprehensive guide on how to use a laser level for accurate, professional-grade results.
Choosing the Right Laser Level
There are several types of laser levels on the market, each suited for different applications. Consider the following when selecting a laser level:
Types of Laser Levels
- Line lasers – Project a horizontal or vertical laser line onto a surface. Best for leveling and aligning over short distances.
- Cross line lasers – Project two perpendicular laser lines (one vertical, one horizontal). Allow leveling in two axes.
- Rotary lasers – Project a laser plane across an entire room. Rotating lasers are the most versatile type.
- Dot lasers – Project a single laser dot. Mainly used for marking reference points.
Accuracy
- Laser levels designed for professional use offer accuracy within 1/16 inch at 30 feet. Consumer models may only be accurate to about 1/8 inch.
- Consider the level of precision needed for your project. The more accuracy, the higher the cost.
Range
- The range refers to the furthest distance the laser can project while maintaining accuracy.
- Long range (up to 200 feet) is useful for large job sites. Short range lasers (around 50 feet) are suitable for most home projects.
Additional Features
- Detectors extend the working range and improve visibility of the laser line.
- Mounting accessories allow attaching the laser to tripods or walls.
- Remote controls allow operating the laser from a distance.
- Plumb points project perfectly vertical datum lines. Useful for plumbing and alignment.
Once you select the appropriate laser level for your needs, it’s time to put it to work. Here are some tips for usage:
Setting Up the Laser Level
Proper setup is crucial for achieving precise, consistent results with your laser level. Follow these steps:
Choose a Stable Location
Place the laser on a flat, stable surface or use a tripod. Avoid vibrations that can disrupt the leveling accuracy.
Check the Surface
Make sure the surface is appropriate for the laser. Very reflective or transparent surfaces can distort the laser line.
Level the Instrument
Use the built-in vial(s) to level the laser unit, either horizontally or vertically depending on the type.
Turn On the Laser
Turn on the laser according to the manufacturer instructions. Most have a power button and a second button to activate the laser.
Adjust Laser Orientation
Use the adjustment knobs to rotate and fine-tune the orientation of the laser line/plane.
Test the Layout
Double check that the projected laser line is level or plumb by measuring at multiple points. Make minor adjustments as needed.
Following proper setup procedures ensures your laser level is projecting an accurate reference line for your project.
Using Line Lasers
Line lasers project a laser line onto surfaces, making them ideal for tasks like leveling shelves, installing cabinets, laying tiles, and more. Here are some tips for using line lasers effectively:
Mark the Laser Line
Use painter’s tape or another non-permanent method to mark where the laser line hits the surface. This creates a reference point once the laser is moved.
Work in Sections
Move and adjust the laser incrementally to lay out lines across larger surfaces. Leapfrog the laser down a wall as you work.
Check for Obstructions
Scan for any objects like cords or tools that could block the laser line and cause an inaccurate layout.
Use a Detector
Line laser detectors extend the working range and make the laser line more visible. Simply place the detector on the surface to pick up the laser signal.
Plumb Down
To transfer a level line from ceiling to floor, use a plumb bob dropped from the line to transfer points straight down.
With some practice, line lasers can be used to accurately align and level projects faster than ever before.
Using Rotary Lasers
Rotary lasers, or “rotating lasers”, project a 360-degree laser plane across an entire room. This allows layout of perfectly level or plumb reference lines over long distances. Follow these tips when using a rotary laser:
Position Centrally
Place the laser as centrally in the room as possible. This provides the maximum coverage area.
Set the Scan Angle
Adjust the scan angle to control the width of the laser plane. Narrow the scan for a tighter plane.
Use a Detector
Detects the laser signal at any point in the room. Locate the “on-grade” position to find the precise level line.
Check Room Corners
Scan the laser plane into the corners to check for high or low points. Mark any areas that are out of level.
Rotate Slowly
For line marking, rotate the laser slowly and use the detector to mark reference points along the line.
Rotary lasers allow fast, large-scale layouts perfect for concrete work, tiling, drywall installation, and more.
Using Dot Lasers
Dot lasers project a single laser point, making them useful for quick marking and alignments:
Mark Centers and Holes
Place the dot directly over the desired mark location. Use the laser dot like an accurate plumb bob.
Transfer Points
When centering items, mark one edge with the dot, then flip the item and transfer the point to the opposite side.
Align Small Objects
Use the laser dot to align items like pictures frames or anchors on a wall by sighting the dot along the edges.
Mark Angles
Many dot lasers have angle modes. Use them to accurately mark angles for installing crown molding, etc.
Use Detector for Precision
For critical alignments, use a laser detector placed at your mark to pinpoint the laser dot location precisely.
Dot lasers excel at quick, repetitive alignment and marking tasks. Their versatility and ease of use makes them ideal for both home and jobsite use.
Laser Level Safety Tips
While laser levels are perfectly safe when used properly, basic precautions should be taken, including:
- Never stare directly into the laser beam
- Do not project lasers near eyes or over populated areas
- Use protective glasses when working within 15 feet of an active laser
- Turn lasers off when not in use and store safely
- Keep lasers away from children
- Check jobsite local regulations regarding use of lasers
By following basic laser level safety principles, you can avoid accidents and use this invaluable tool safely.
Common Laser Level Applications
Laser levels can be used in virtually any application where precise alignment is needed. Here are some of the most common and useful applications:
Installing Cabinets, Shelves, etc.
Line up cabinets, shelving, artwork, etc perfectly straight and level on walls.
Laying Tile
Ensure perfectly straight tile layouts on floors and walls.
Leveling Drop Ceilings
Adjust track lighting, ceiling tile framework, etc to a precise plane.
Grading and Excavating
Level trenches, concrete forms, and more to exact depths over large areas.
Squaring and Plumbing Walls
Check vertical alignment of wall framing and finishes to find high or low points.
Alignment of Electrical Systems
Use laser lines to align multiple electrical boxes, conduits, and more.
Leveling Appliances and Machinery
Properly level appliances, machinery, access points, and more for proper operation.
With the right techniques, laser levels can simplify almost any project where accuracy matters.
FAQs About Using Laser Levels
How do I make the laser line more visible?
- Use a detector to pick up the laser signal. Or, try spraying some dust in the air or pointing the beam at a semi-reflective surface.
Why does my laser line appear to waver or move?
- Vibrations or air currents are likely causing the motion. Try securing the laser and eliminating air flow in the room.
How can I extend the working range of my laser level?
- Use a detector designed for your model of laser level. Quality detectors can pickup the beam up to 200 feet away.
Why does my laser line disappear at certain spots?
- Obstructions, very light or dark surfaces, acute angles, and high gloss finishes can all prevent laser line projection. Move the laser for an unobstructed layout.
How should I position the laser vertically?
- For horizontal layouts, mount the laser on a tripod approximately at the midpoint of your work area. Or hang from hooks on the wall or ceiling.
Can I leave the laser level unattended while on?
- Never leave a laser level unattended for safety reasons. Turn the unit off or block the output beam when not in use.
How accurate are laser levels?
- Professional laser levels typically provide accuracy to 1/16 inch or better at ranges up to 30 feet. Consumer models may only be accurate to about 1/8 inch.
Can I use outdoor lasers indoors?
- Outdoor lasers are safe for indoor use provided proper precautions are taken, including wearing laser safety goggles. Ensure the working area is free of reflective surfaces.
How do I clean the glass optic lens on my laser?
- Gently wipe the optic lens with a soft cloth or cotton swab dampened with isopropyl alcohol. Take care not to scratch the lens.
Following laser level best practices and taking basic safety precautions will allow you to put this valuable tool to work on your next project.
Conclusion
From DIY home renovations to large professional job sites, laser levels are an essential tool for achieving accuracy in any project. While proper setup and operation takes some practice, the ability to quickly lay out precise, level lines can elevate the quality of your work in a wide range of applications. Whether you need to hang pictures perfectly straight, lay flooring without lips or gaps, or grade a yard flawlessly, a quality laser level is easy to use once you know the basics. By following the tips outlined here for choosing, setting up, and utilizing the various types of laser levels, you can harness the full power of this game-changing tool. Precise alignment has never been easier!